In the Vitakkasaṇṭhāna Sutta — The Relaxation of Thoughts (MN 20) the Buddha provides five themes to attend to at the appropriate times for those intent on heightening the mind. (The full post includes images and passages with explanations)
1) Small Peg Knocking Out Larger One (to attend to another theme)
2) Disgusted By Wearing Carcass (to know certain thoughts are unskillful, blameworthy, and resulting in stress)
3) Looking Away (to pay no mind to unskillful thoughts)
4) From Running To Walking To Standing To Sitting To Lying Down (to relax thought fabrications)
5) Clenching Teeth (to crush unskillful/evil mind with awareness)